91437427 has 2 divisors, whose sum is σ = 91437428. Its totient is φ = 91437426.

The previous prime is 91437413. The next prime is 91437497. The reversal of 91437427 is 72473419.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91437427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91437497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45718713 + 45718714.

It is an arithmetic number, because the mean of its divisors is an integer number (45718714).

Almost surely, 2^91437427 is an apocalyptic number.

91437427 is a deficient number, since it is larger than the sum of its proper divisors (1).

91437427 is an equidigital number, since it uses as much as digits as its factorization.

91437427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 91437427 is about 9562.2919323769. The cubic root of 91437427 is about 450.5136964953.

The spelling of 91437427 in words is "ninety-one million, four hundred thirty-seven thousand, four hundred twenty-seven".